import { AbstractJsonRpc } from "./JsonRpc";
import { JsonRpc } from "./JsonRpc";
import { Batch, RawBatchResponse } from "./Batch";
export declare type StatusListener = (status: boolean) => void;
/**
 * JsonRpc that delegates call to an underlying provider and tracks it's state. If underlying JsonRpc failed to
 * return response it gets market as invalid and is not going to be called until it will be fixed.
 */
export declare class RevalidatingJsonRpc extends AbstractJsonRpc {
    private _delegate;
    private _listener;
    private _active;
    private _interval;
    private _timeoutId?;
    /**
     *
     * @param interval interval (in ms) to revalidate RPC
     * @param delegate
     */
    constructor(interval: number, delegate: JsonRpc);
    start(): void;
    stop(): void;
    /**
     * Setup a listener for RPC status.
     *
     * Function `function(stat: boolean)` will be called each time status changed
     *
     * @param value
     */
    set listener(value: StatusListener);
    get status(): boolean;
    private update;
    /**
     * Calls revalidation of the underlying RPC provider
     */
    revalidate(): Promise<boolean>;
    execute(batch: Batch, force?: boolean): Promise<RawBatchResponse>;
}